Improvement in mowers



2She'eiils-*Sheet 1. R. CAMPBELL.

Mower.

' No. 217,268. l Patented July 8,1879.

n lllll WM *MW R. CAMPBELL.

Mower. y No. 217,268.l i Patented July 8,1879.

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2 Sheets-Sheet 2.

NITED STATES PATENT OEEIGE.

ROBERT CAMPBELL, ALLEGHENY, PENNSYLVANIA;

u IMPROVEMENT VIN MowERs.

Specificationforming part of Letters Patent No. 217,268, dated July 8,1879; application filed November 25, 1878.

To all whom it 'may concern.' Be it known that LROBERT CAMPBELL, of

Allegheny, in the county of Allegheny'and State of Pennsylvania, haveinvented certain new` and useful Improvements in Harvesters;

and I do hereby declare the following to be a full, clear, and exactdescription of the inven-l T tion, such as will enable others skilled inthe art to which it pertains to make and use it, reference beinghad tothe accompanying drawings, which form part of this specification.

My invention relates to an improvement in Figs. 2 and 4 are sideelevations of the same.V

Figs. 3, 5, and 6 are detail views. `The motor-wheel B 'has a groove, a,within its periphery or tread in the plane of rotation, havingindentations and projectionsv formed upon epicycloidal curvesterminating at the apices of the projections.

The curves of the indentations are sufficient to allow the free movementof friction rollers or Wheels of from one and one-half to three inchesin diameter. Said curves diminish their curvature to the apices of theprojections formed between them.

This construction admits of all thevelocity and power required and' allthe strength of v material needed inthe engaged and correspondin gmechanismV without undue friction.

The double lever L consists of` -a single Vbar so curved andfurnished'with two arms, b and c, that its curvature andarmswillcorrespond, respectively, with the outer face of the groove a andits indentations and projections in such a manner as will place the armsin adjacent and opposite indentations within the groove. The doublelever L is pivoted upon a curved arm, d, affixed to the inner face ofthe front cross-bar of the motor-frame M. Said lever, having a squarebox, g, formed within or upon it at an equal distance from its arms b c,is fulcrnmed by said box upon a collar, h, havi ing square lateral facesneatly fitting two opposite sides of said box, but leaving a certainspace, i, between said collar and the remain- The depressing-lever-H- ising sides ofthe box for lateral motion. This combined movement bringsthe arms of the 'double lever in contact with the projections on theopposite sides of the groove, allowing said arms to actsimultaneouslyfand lwith equal der to obtain the entire powerofthe saidfriction-wheel, or the combined power of both arms b and c, and thelateral throw of the cutters depends on the distance of the point K`below the second friction roller or wheel, c.

At the point K is the arm m, that engages the slotted arm n of thescythe or cutter. It is furnished with a neatly-fitting collar with twoparallel faces to lit the lslotted arma of the scythe and slide freelywithin it while in motion. l

The lever D is pivoted to the motor-frame M and locked in position by aratchet-wheel, p, `said ratchet being detached by a pressure or movementof the attendants foot when the frame of the cutter is lowered foroperation, the attendant holding and placing the lever.

By slightly raising the leverI) the points or guards F are depressed inorder to gather lodged grassor grain, but by raising the lever to itshighest position the cutter or scythe is disengaged from action and, inconnection with the cutter-bar S, lifted into a secure position in frontof the motor-wheel, resting against the lcurved arm Gr. connected withthe elevating-lever D by a chain, and receives its movement from thelatter. This movement is limited to a rolling mot-ion that depressesthe-guards suiflciently for gathering up lodged grain or grass. Thismotion also precedes the elevation of the cutter-frame, to allow thecutter-bar to clear the motor-wheel in the act of elevation.

The cutter-bar I combines with the bar a',

operated by the lever H, and receives a roll ing motion from it by beingattached to a pivot-bar, b', beneath its inner end, and which is in turnpivoted upon the bar af, operated by the lever H. The said pivot-bar bserves also as a pivot, which allows the cutter-bar to rise slightilange or guard turned down.

or fall at its outer end, in order to accommodate the uneven surface ofthe ground during the operation of cutting. It also acts as a pivot forthe horizontal movement of the cutter-bar when met by a seriousobstruction, which causes the inner end of the cutter-bar to press uponthe foot of the check-lever P and give a check to the team.

It furthermore allows the cutter-bar to rise infront of the motor-Wheelby actin g as a pivot while the lever D carries the cutter-frame Rupward, bringing the inner end of the cutterbar against the foot of thecurved arm G of the motor-frame M, and by the same movement assists indisengaging the scythe from the arm m.

In its connection with the seythe the cutterbar has bearings upon itsupper surface, which enter slotted grooves on the under surface'of thescy the, upon which the latter vibrates when in operation.

The cutter bar is furnished with slotted vguards F to receive the4cutter-sections of the tions, where a depression will allow the grainor grass to feed freely.

I v The scythe S is furnished with slotted grooves on its under surface,which slide upon bearings on the upper surface of the cutter-bar. Theseare oiled from above through the scythe.

Along the front face of vthe scythe-bar is a On the inner end of thescythe is a slotted arm, n, which receives the arm m of the double leverL and the motion of the same.

The scythe S is armed with cutter-sections, so arranged and constructedas to act in concert with the steel bits on the guards during Y theoperation of cutting. 'lhe cutter-sections are double, triple,'or morefold, and each twin section faces its cutting-edges in an oppositedirection from its fellow section.

v The curved arm Gr, supported by the motorframe M, projects forward anddown sufficiently to meet and bear upon the inner end of the cutter-bar,to turn it on the pivot, and cause it to rise into a secure position infront of the motor-wheel supported by said curved arm in an inclinedposition.

The check-lever P is pivoted to either the front inner end or the sideof the cutter-frame, and leans toward the team, being held in thisposition by check-lines connecting it with the team. The lower end ofthis lever is arranged and placed to receive an impulse from the innerend of the cutter-bar, which will draw its upper end backward toward themotor-Wheel, drawing the reins and checking the team.

The seat Q for the driver is supported by the rear cross-bar of themotor-frame and its spring flexes forward. This gives greater firmnesstothe drivers feet and a better poise to his body thanwhen the springflexes backward.

Between the projections in the groove of the motor-wheel at the bottomof the curves a recess is formed, and a cushion of gutta-percha or othersuitable material inserted to receive' the recoil of the friction-wheelwhen it is transferred from the opposite side of the groove; andsimilarly in the sides of the squarebox in lever L, against which thecollar is forced right and left, is a cushion of suitable elasticmaterial.

Having thus described my invention, -I claiml. The motor-wheel B, withgroove a, with cushions -in its curves, adapted to and -in combinationwith the double lever L, having arms b and c, and scythe S, with arm a,for engaging the lever L, substantially as shown and described.

2. A double lever, L, having its fulcrum on a square-faced collar,work-ing upon an arm, and adapted to slide right and left againstcushions and engage the arms b and c simultaneously, substantially asset forth.

3. The combination of the lever D and ratchet-wheel withthe lever H,operating a rolling bar connected with the cutter-frame, and apivot-bar, in connection with a-cutterbar, substantially as shown anddescribed.

In testimony tha-tI claim the foregoing Ihave Y hereunto set my handthis 12thday of Novem-

